How did I get sick...???

Where did this illness come from... was it an allergic reaction to my new work environment or due to the fact that the girl who sat next to me in orientation could not seem to cover her mouth... Why can't people teach their kids how to be sanitary... I tried to avoid sitting next to her the next day, but alas the girl who came the first day dressed professionally and much more casual the day after, sat right next to me again. I tried to not sit next to the ill oppressed one, and now here I lay.. on my bed...sick...why...